Date: 2009. 7. 22, 5:00 PM Place: Mogam Hall, Bldg 500 -Abstract- Dirhodium compounds are highly effective catalysts for a broad range of chemical transformations. This presentation will focus on three applications: catalytic metal carbene reactions, Lewis acid catalysis, and chemical oxidations, as well as on our discovery of bis(aryl)dirhodium(III) compounds that has opened an entirely new area in dirhodium chemistry. Optical yields at or greater than 95% have been achieved with high turnover numbers in carbon-carbon bond forming reactions. Diastereoselectivity, regioselectivity, and chemoselectivity are also high, and enantiomer differentiation is achieved with exceptional ease. Chemical oxidations by tert-butylhydroperoxide catalyzed by dirhodium compounds provide adiversity of transformations,and recent applications will be presented and discussed. The basis for the high level of control that has been achieved is the use of carboxamidate ligands.